28 articles tagged JWT.
If you’ve ever read a specification like WebAuthn, DID Core, SD-JWT VC, BBS Signatures, OID4VCI, or OID4VP, you’ve probably encountered references to P-256, secp256k1, Ed25519, or BLS12–381.
Read article: Elliptic Curve Groups: The Mathematical Engine Behind Modern Digital IdentityThere is a recurring problem in the Verifiable Credentials world.
Read article: SD-JWT VC vs. BBS-2023: Why These Aren’t Really the Things You’re ComparingSelective Disclosure is fundamentally a mathematical concept. The protocols (SD-JWT VC, BBS-2023, AnonCreds, Idemix, U-Prove, etc.) are really just engineering built on top of several branches of mathematics.
Read article: Selective Disclosure: The MathWebAuthn is actually the tip of a much larger iceberg. Like the SD-JWT VC spec, it is built upon several W3C, FIDO Alliance, and IETF specifications. Together, these define a complete passwordless authentication ecosystem.
Read article: WebAuthN: Passwordless LoginsAnother day, another identity specification to debug.
Read article: Identity Protocol Debugger Now Supports SD-JWT VC Issuance and Presentation FlowsI’ve touched on the topic of using JWT as an Access Token on several previous blog posts:
Read article: JWT as Oauth2 Access Tokens & Refresh Tokens— Invalidation: The Awkward RealityThe Internet Engineering Task Force (IETF) has 10K+ published Request For Comments (RFCs) documents. The industry hears about RFCs all the time. But, as the name implies (“request for comments”) that isn’t the final step in the process. A very small number of RFCs are promoted to Internet…
Read article: How Many IETF RFCs Actually Become Standards?If you’ve ever opened the specifications surrounding SD-JWT Verifiable Credentials and thought, “Surely this is a straightforward document that defines a credential format.”
Read article: SD-JWT VC: The Identity Industry’s Latest Attempt to Win a Nobel Prize in AcronymsFor anyone who has been paying attention, this blog post has been a long-time coming for multiple reasons. First, this is my first blog post in a couple of years — I’ve been heads down on a couple of projects for awhile now. This is literally the first time I’ve “come up for air” since the last…
Read article: RFC 9068: A JWT-Based OAuth2 Access Token Format StandardThis blog post expands on delegation and related concepts introduced in my Kerberos Delegation blog post. It also brings together two blog series I’ve been working on over the years: SAML2 vs. JWT Series and Kerberos and Windows Security Series. Delegation is a critical building block of end-to-end…
Read article: Delegation — A General Discussion
